package servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import DB.CouchDB;
import DB.GroupTableDB;
import Utility.mail;

import com.google.gson.JsonObject;
import com.sun.mail.imap.protocol.MailboxInfo;

public class Invite extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Invite() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String path = request.getContextPath();
		String basePath = request.getScheme() + "://" + request.getServerName()
				+ ":" + request.getServerPort() + path + "/";
		HttpSession session = request.getSession(true);
		String userID = (String) request.getAttribute("email");

		String groupID = (String) session.getAttribute("group");
		String owner = (String) session.getAttribute("email");
		GroupTableDB groupTableDB = new GroupTableDB();
		String groupName = groupTableDB.selectGroupByID(groupID).get(
				GroupTableDB.NAMECOL).getAsString();

		JsonObject object = new JsonObject();

		if (userID == null || userID.equals("")) {
			object.addProperty("message", "The owner should not be null!");
		} else if (groupID == null || groupID.equals("")) {
			object.addProperty("message", "The group name should not be null!");
		} else {
			CouchDB db = new CouchDB();

			if (!db.checkUserExist(userID)) {
				object.addProperty("message",
						"The user to be invited is not in the system!");
			} else {
				if (groupTableDB.selectGroupByID(groupID).get(
						GroupTableDB.OWNERCOL).getAsString().equals(owner)) {
					mail.sendInviteMail(userID, groupID, groupName, owner,
							basePath);
					object.addProperty("message",
							"The invitation has been sent successfully!");
				} else {
					object.addProperty("message",
							"Only the group owner can invite people!");
				}
			}
		}
		response.setContentType("application/json");
		PrintWriter out = response.getWriter();
		out.print(object);
		out.flush();
		out.close();

	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
